Noncyanide leaching of an auriferous pyrite ore from Ecuador

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Publication Type Journal Article
School or College College of Mines & Earth Sciences
Department Metallurgical Engineering
Creator Miller, Jan D.
Other Author Munoz, G.
Title Noncyanide leaching of an auriferous pyrite ore from Ecuador
Date 2000
Description Gold leaching of an auriferous pyrite ore from the Portovelo deposit in Ecuador indicates that noncyanide leaching systems, such as thiocyanate and thiourea, are not as effective as the traditional cyanide system. For example, whereas approximately 95% of the gold can be leached from the ore with cyanide, only about 50% gold dissolution can be achieved with a thiocyanate leaching system. Electrochemical measurements indicate that gold is not cathodically protected by pyrite in these systems. Based on the results of preliminary diagnostic experiments, it appears that gold dissolution in thiocyanate and thiourea systems is limited by passivation due to the formation of either elemental sulfur or sulfur compounds on the gold surface.
Type Text
Publisher Society for Mining, Metallurgy, and Exploration
Volume 17
Issue 3
First Page 198
Last Page 204
Subject Gold leaching; Refractory ores; Thiocyanate; Thiourea
Subject LCSH Gold; Ore-dressing; In situ processing (Mining)
Language eng
Bibliographic Citation Miller, J. D., & Munoz, G. (2000). Noncyanide leaching of an auriferous pyrite ore from ecuador. Minerals and Metallurgical Processing, 17(3), 198-204.
Format Medium application/pdf
Format Extent 779,210 Bytes
Identifier ir-main,4637
ARK ark:/87278/s68w3xdn
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 702539
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